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Cell Cultures and Characteristics

Cell Cultures and Characteristics
Important example(s) of enriched medium/media is/ are

Blood agar
Bordet-gengou medium
All of these
Loeffler's serum slope

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Cell Cultures and Characteristics
In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

-48 to -58°C
-20 to -30°C
-60 to -78°C
-30 to -48°C

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Cell Cultures and Characteristics
Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?

Streak plate technique
Spread plate
Both (a) and (b)
Pour plate

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Cell Cultures and Characteristics
A disease producing species occurring in a mixed culture can often be selected on the basis of its

pathogenic properties
special nitrogen source
none of these
special carbon source

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Cell Cultures and Characteristics
Which of the following bacteria dies quickly after drying?

Treponema pallidium
Pseudomonas aeruginosa
Staphylococcus aureus
Mycobacterium tuberculosis

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Cell Cultures and Characteristics
When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as

selective medium
enrichment medium
differential medium
enriched medium

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